diff --git a/CHANGELOG.md b/CHANGELOG.md
index 80f2a13..a9bfdf5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ## [Unreleased]
 
+## [3.1.0] - 2020-04-01
+### Added
+- Input variable `commit_message` for using a custom commit message.
+
 ## [3.0.1] - 2020-03-28
 ### Fixed
 - Fix copying of files with names containing spaces.
@@ -26,7 +30,8 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 ## 1.0.0 - 2019-07-09
 
-[Unreleased]: https://github.com/andstor/copycat-action/compare/v3.0.1...HEAD
+[Unreleased]: https://github.com/andstor/copycat-action/compare/v3.1.0...HEAD
+[3.1.0]: https://github.com/andstor/copycat-action/compare/v3.0.1...v3.1.0
 [3.0.1]: https://github.com/andstor/copycat-action/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/andstor/copycat-action/compare/v2.0.0...v3.0.0
 [2.0.0]: https://github.com/andstor/copycat-action/compare/v1.1.0...v2.0.0
diff --git a/README.md b/README.md
index 4334ad0..8c99687 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ The following input variable options can/must be configured:
 |`exclude`|Optional|A glob pattern for excluding paths. For example `*/tests/*`.||
 |`src_wiki`|Optional|Set to `true` if the source repository you want to copy from is the GitHub Wiki.| `false`|
 |`dst_wiki`|Optional|Set to `true` if the destination repository you want to copy from is the GitHub Wiki.|`false`|
+|`commit_message`|Optional|A custom git commit message.||
 |`username`|Optional|The GitHub username to associate commits made by this GitHub action.|[`GITHUB_ACTOR`](https://help.github.com/en/actions/configuring-and-managing-workflows/using-environment-variables)|
 |`email`|Optional|The email used for associating commits made by this GitHub action.|[`GITHUB_ACTOR`](https://help.github.com/en/actions/configuring-and-managing-workflows/using-environment-variables) `@users.noreply.github.com`|
 
diff --git a/action.yml b/action.yml
index 1db8a0a..424ee54 100644
--- a/action.yml
+++ b/action.yml
@@ -49,6 +49,9 @@ inputs:
     description: 'Set to true if the destination repository you want to copy from is the GitHub Wiki'
     required: false
     default: false
+  commit_message:
+    description: 'A custom git commit message.'
+    required: false
   username:
     description: 'The GitHub username to associate commits made by this GitHub action'
     required: false
@@ -72,5 +75,6 @@ runs:
     - ${{ inputs.exclude }}
     - ${{ inputs.src_wiki }}
     - ${{ inputs.dst_wiki }}
+    - ${{ inputs.commit_message }}
     - ${{ inputs.username }}
     - ${{ inputs.email }}
diff --git a/entrypoint.sh b/entrypoint.sh
index 1bf4f55..00ce482 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 #
 # @author André Storhaug <andr3.storhaug@gmail.com>
-# @date 2020-03-09
+# @date 2020-04-01
 # @license MIT
-# @version 3.0.0
+# @version 3.1.0
 
 set -o pipefail
 
@@ -22,6 +22,7 @@ FILTER="$INPUT_FILTER"
 EXCLUDE="$INPUT_EXCLUDE"
 SRC_WIKI="$INPUT_SRC_WIKI"
 DST_WIKI="$INPUT_DST_WIKI"
+COMMIT_MESSAGE="$INPUT_COMMIT_MESSAGE"
 USERNAME="$INPUT_USERNAME"
 EMAIL="$INPUT_EMAIL"
 
@@ -129,10 +130,12 @@ mkdir -p ${DST_REPO_NAME}/${DST_PATH%/*} || exit "$?"
 cp -rf ${FINAL_SOURCE} ${DST_REPO_NAME}/${DST_PATH} || exit "$?"
 cd ${DST_REPO_NAME} || exit "$?"
 
-if [ -f "${BASE_PATH}/${FINAL_SOURCE}" ]; then
-    COMMIT_MESSAGE="Update file in \"${SRC_PATH}\" from \"${GITHUB_REPOSITORY}\""
-else
-    COMMIT_MESSAGE="Update file(s) \"${SRC_PATH}\" from \"${GITHUB_REPOSITORY}\""
+if [[ -z "${COMMIT_MESSAGE}" ]]; then
+    if [ -f "${BASE_PATH}/${FINAL_SOURCE}" ]; then
+        COMMIT_MESSAGE="Update file in \"${SRC_PATH}\" from \"${GITHUB_REPOSITORY}\""
+    else
+        COMMIT_MESSAGE="Update file(s) \"${SRC_PATH}\" from \"${GITHUB_REPOSITORY}\""
+    fi
 fi
 
 if [ -z "$(git status --porcelain)" ]; then